Ballpoint pen



FIG. 1 is a perspective view of the top, front and left side of a ballpoint pen showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a front elevational view thereof, shown without the cap for convenience of illustration;

FIG. 8 is a left side elevational view thereof;

FIG. 9 is a right side elevational view thereof;

FIG. 10 is a top plan view thereof; and,

FIG. 11 is a right side elevational view of the cap removed from the pen and shown by itself for convenience of illustration. 

The ornamental design for a ballpoint pen, as shown and described. 